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bcm 50 trouble with cabinet

bcm 50 trouble with cabinet

bcm 50 trouble with cabinet

we have a bcm 50 with 2 expansion cabinets, one is a 8 cct gatm, the other cabinet is a dsm32+. If the system loses power it will reboot except for the 3rd cabinet with the dsm32+. a simple pull of the power cord out and back in will restart it. shall we replace power supply, cabinet or dsm32+ or all three? we have 25-30 tels on the DSM32.

RE: bcm 50 trouble with cabinet

system is R3 and patched with:


which I assume is up to date.

RE: bcm 50 trouble with cabinet

can you (or anyone else) think of a situation where the cabinet and the dsm32+ produces a static like noise on the phones on the card. Trunks test good whenever I go there. No logs in the system to indicate a problem.

RE: bcm 50 trouble with cabinet

You could try swapping over the power leads from both expansion cabinets to see if the fault moves, then do the same for the cabinets, but change over the modules inside each expansion cabinet.

There wouldn't be a need to reboot the BCM main unit.
I'm assuming that the patch cables go direct from the BCM main unit to each of the expansion ones?.

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = http://somertel.com

RE: bcm 50 trouble with cabinet

BCM50 expansion cabinets are supposed to be connected by a shielded Cat5e cable of a specific length (3 feet I believe). If you use a cable that is not shielded or of a different length, noise could be introduced or the timing might be off - bit errors could sound like noise.

RE: bcm 50 trouble with cabinet

I think one of the patch cords isn't shielded. I am going to replace DSM32 and Trunk card. The trunk card generated this alarm:

eventID=35; message=Core Telephony - Media Bay Module firmware download failure.; problemResolution=Reboot the BCM. If the problem persists, power down the system and check the expansion chassis connections. Check for corresponding alarm 31 or 79 to determine which module is having issues. If problem persists replace corresponding hardware.
<information> 2018-04-03T11:55:20.811214 bcm50 CORE [1653]: eventID=55; message=Core Telephony - Media Bay Module firmware download complete.; problemResolution=No Action Required.

it seems to be working fine, I am not certain if that is part of a normal boot up procedure.

Would placing ferrite cores on the 25 pair aid at all? We used to put them on Mitel 25 pairs.

RE: bcm 50 trouble with cabinet

Non shielded patch cord found in use. Replaced it and the cabinet and power supply.

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